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java.lang.Objectcom.smartgwt.client.core.JsObject
com.smartgwt.client.core.DataClass
com.smartgwt.client.data.OperationBinding
public class OperationBinding
An operationBinding tells a DataSource how to execute one of the basic DS operations: fetch,
add, update, remove. See operationBindings
.
Field Summary |
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Fields inherited from class com.smartgwt.client.core.JsObject |
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jsObj |
Constructor Summary | |
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OperationBinding()
|
|
OperationBinding(DSOperationType operationType,
java.lang.String dataURL)
|
|
OperationBinding(com.google.gwt.core.client.JavaScriptObject jsObj)
|
Method Summary | |
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java.lang.String |
getCallbackParam()
Applies only to dataFormat: "json". |
DSDataFormat |
getDataFormat()
Format for response data for this operation. |
DSProtocol |
getDataProtocol()
Controls the format in which inputs are sent to the dataURL. |
RPCTransport |
getDataTransport()
Transport to use for this operation. |
java.lang.String |
getDataURL()
URL to contact to fulfill DSRequests for this operationBinding. |
ExportFormat |
getExportAs()
The format in which the data should be exported. |
java.lang.String[] |
getExportFields()
The list of field-names to export. |
java.lang.String |
getExportFilename()
The name of the file to save the exported data into. |
java.lang.Boolean |
getExportResults()
When set, causes the results of the DataSource Operation to be exported to a file, whose name and format are indicated by exportFilename and
exportAs respectively. |
java.lang.Boolean |
getInvalidateCache()
If set, every invocation of this operationBinding will invalidate the local cache, forcing a server visit to refresh the data. |
java.lang.String |
getLineBreakStyle()
The style of line-breaks to use in the exported output. |
java.lang.String |
getMethodArguments()
You can explicitly declare the arguments to be passed to serverMethod using this attribute. |
java.lang.String |
getOperationId()
Optional operationId if this DataSource supports two or more variants of one of the basic DataSource operations, for instance, a "fetch" that uses full text search and a "fetch" that accepts per-field search criteria. |
DSOperationType |
getOperationType()
Which operationType this operationBinding is for. |
static OperationBinding |
getOrCreateRef(com.google.gwt.core.client.JavaScriptObject jsObj)
|
java.lang.Boolean |
getPreventHTTPCaching()
Configures preventHTTPCaching on a per-operationType basis. |
java.lang.Boolean |
getQualifyColumnNames()
Specifies, for this specific operationBinding, whether to qualify column names with table names in any SQL we generate. |
java.lang.String |
getRecordName()
For an XML DataSource, tagName of the elements to be used as records. |
java.lang.String |
getRecordXPath()
For an XML or JSON DataSource, XPath expression used to retrieve the objects that will become DataSource records. |
java.lang.String |
getServerMethod()
The name of the method to invoke on the com.smartgwt.client..ServerObject for this operationBinding. |
java.lang.Boolean |
getSpoofResponses()
For a DataSource contacting a serviceNamespace , setting
this flag means the DataSource doesn't actually attempt to contact the server but generates
a sample response instead, based on the XML Schema of the response message embedded in the
WSDL.
|
java.lang.Boolean |
getUseFlatFields()
Setting useFlatFields on an operationBinding is equivalent to setting
useFlatFields on all DataSource requests with the same operationType
as this operationBinding .
|
java.lang.String |
getWsOperation()
Name of the web service operation that will be invoked in order to execute this DataSource operation. |
void |
setCallbackParam(java.lang.String callbackParam)
Applies only to dataFormat: "json". |
void |
setDataFormat(DSDataFormat dataFormat)
Format for response data for this operation. |
void |
setDataProtocol(DSProtocol dataProtocol)
Controls the format in which inputs are sent to the dataURL. |
void |
setDataTransport(RPCTransport dataTransport)
Transport to use for this operation. |
void |
setDataURL(java.lang.String dataURL)
URL to contact to fulfill DSRequests for this operationBinding. |
void |
setDefaultParams(java.util.Map defaultParams)
HTTP parameters that should be submitted with every DSRequest. |
void |
setExportAs(ExportFormat exportAs)
The format in which the data should be exported. |
void |
setExportFields(java.lang.String[] exportFields)
The list of field-names to export. |
void |
setExportFilename(java.lang.String exportFilename)
The name of the file to save the exported data into. |
void |
setExportResults(java.lang.Boolean exportResults)
When set, causes the results of the DataSource Operation to be exported to a file, whose name and format are indicated by exportFilename and
exportAs respectively. |
void |
setInvalidateCache(java.lang.Boolean invalidateCache)
If set, every invocation of this operationBinding will invalidate the local cache, forcing a server visit to refresh the data. |
void |
setLineBreakStyle(java.lang.String lineBreakStyle)
The style of line-breaks to use in the exported output. |
void |
setMethodArguments(java.lang.String methodArguments)
You can explicitly declare the arguments to be passed to serverMethod using this attribute. |
void |
setOperationId(java.lang.String operationId)
Optional operationId if this DataSource supports two or more variants of one of the basic DataSource operations, for instance, a "fetch" that uses full text search and a "fetch" that accepts per-field search criteria. |
void |
setOperationType(DSOperationType operationType)
Which operationType this operationBinding is for. |
void |
setPreventHTTPCaching(java.lang.Boolean preventHTTPCaching)
Configures preventHTTPCaching on a per-operationType basis. |
void |
setQualifyColumnNames(java.lang.Boolean qualifyColumnNames)
Specifies, for this specific operationBinding, whether to qualify column names with table names in any SQL we generate. |
void |
setRecordName(java.lang.String recordName)
For an XML DataSource, tagName of the elements to be used as records. |
void |
setRecordXPath(java.lang.String recordXPath)
For an XML or JSON DataSource, XPath expression used to retrieve the objects that will become DataSource records. |
void |
setRequestProperties(DSRequest requestProperties)
Additional properties to pass through to the DSRequest created for this operation. |
void |
setResponseDataSchema(DataSource responseDataSchema)
Optional schema describing how to extract DataSource records from the XML elements selected. |
void |
setServerMethod(java.lang.String serverMethod)
The name of the method to invoke on the com.smartgwt.client..ServerObject for this operationBinding. |
void |
setSpoofResponses(java.lang.Boolean spoofResponses)
For a DataSource contacting a serviceNamespace , setting
this flag means the DataSource doesn't actually attempt to contact the server but generates
a sample response instead, based on the XML Schema of the response message embedded in the
WSDL.
|
void |
setUseFlatFields(java.lang.Boolean useFlatFields)
Setting useFlatFields on an operationBinding is equivalent to setting
useFlatFields on all DataSource requests with the same operationType
as this operationBinding .
|
void |
setWsOperation(java.lang.String wsOperation)
Name of the web service operation that will be invoked in order to execute this DataSource operation. |
void |
setXmlNamespaces(XmlNamespaces xmlNamespaces)
Optional object declaring namespace prefixes for use in OperationBinding.recordXPath and DataSourceField.valueXPath XPath expressions. |
Methods inherited from class com.smartgwt.client.core.JsObject |
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isCreated, setJsObj |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public OperationBinding()
public OperationBinding(com.google.gwt.core.client.JavaScriptObject jsObj)
public OperationBinding(DSOperationType operationType, java.lang.String dataURL)
Method Detail |
---|
public static OperationBinding getOrCreateRef(com.google.gwt.core.client.JavaScriptObject jsObj)
public void setOperationType(DSOperationType operationType)
operationType
- operationType Default value is nullpublic DSOperationType getOperationType()
public void setOperationId(java.lang.String operationId)
operationId
for usage.
operationId
- operationId Default value is nullpublic java.lang.String getOperationId()
operationId
for usage.
public void setServerMethod(java.lang.String serverMethod)
com.smartgwt.client..ServerObject
for this operationBinding.
serverMethod
- serverMethod Default value is nullpublic java.lang.String getServerMethod()
com.smartgwt.client..ServerObject
for this operationBinding.
public void setMethodArguments(java.lang.String methodArguments)
serverMethod
using this attribute. This isn't required - in the
absense of methodArguments
, the DMI implementation will still automagically
pass a stock set of arguments to your method (see the overview in com.smartgwt.client..ServerObject
), but
specifying arguments explicitly gives you more flexibility in what can be passed.
The format for specifying methodArguments
is as a comma separated list of VTL
(Velocity Template Language) expressions. See the
VTL Reference
and Velocity User Guide
for an overview of how to use VTL.
The Velocity context is pre-populated with the following variables - you can pass these verbatim as arguments, or call methods on these objects and pass the resulting values:
public DSResponse fetch(SupplyItem creteria, long startRow, long endRow)
You can invoke it by specifying methodArguments
as follows:
methodArguments="$dsRequest.criteria, $dsRequest.startRow, $dsRequest.endRow"
methodArguments
, there would be no way for you to specify
startRow/endRow
as arguments. You could, of course, simply declare the method
to take a DSRequest
object and call getStartRow()/getEndRow()
in
the body of the method.
methodArguments
- methodArguments Default value is nullpublic java.lang.String getMethodArguments()
serverMethod
using this attribute. This isn't required - in the
absense of methodArguments
, the DMI implementation will still automagically
pass a stock set of arguments to your method (see the overview in com.smartgwt.client..ServerObject
), but
specifying arguments explicitly gives you more flexibility in what can be passed.
The format for specifying methodArguments
is as a comma separated list of VTL
(Velocity Template Language) expressions. See the
VTL Reference
and Velocity User Guide
for an overview of how to use VTL.
The Velocity context is pre-populated with the following variables - you can pass these verbatim as arguments, or call methods on these objects and pass the resulting values:
public DSResponse fetch(SupplyItem creteria, long startRow, long endRow)
You can invoke it by specifying methodArguments
as follows:
methodArguments="$dsRequest.criteria, $dsRequest.startRow, $dsRequest.endRow"
methodArguments
, there would be no way for you to specify
startRow/endRow
as arguments. You could, of course, simply declare the method
to take a DSRequest
object and call getStartRow()/getEndRow()
in
the body of the method.
public void setWsOperation(java.lang.String wsOperation)
Valid only for a DataSource that has a WebService (serviceNamespace
is
set). Otherwise, use dataURL
.
Setting wsOperation
means that data
will be serialized as the
request message for the specified web service operation, with namespacing and soap encoding
handled automatically. See DataSource.transformRequest(com.smartgwt.client.data.DSRequest)
for how to customize what
data is sent to the server.
wsOperation
- wsOperation Default value is nullpublic java.lang.String getWsOperation()
Valid only for a DataSource that has a WebService (serviceNamespace
is
set). Otherwise, use dataURL
.
Setting wsOperation
means that data
will be serialized as the
request message for the specified web service operation, with namespacing and soap encoding
handled automatically. See DataSource.transformRequest(com.smartgwt.client.data.DSRequest)
for how to customize what
data is sent to the server.
public void setDataURL(java.lang.String dataURL)
dataURL
is typically set as DataSource.dataURL rather than on each individual
operationBinding.
dataURL
can be omitted for a DataSource using a Web Service
(serviceNamespace
is set).
dataURL
- dataURL Default value is nullpublic java.lang.String getDataURL()
dataURL
is typically set as DataSource.dataURL rather than on each individual
operationBinding.
dataURL
can be omitted for a DataSource using a Web Service
(serviceNamespace
is set).
public void setDataProtocol(DSProtocol dataProtocol)
When a DataSource operation such as fetchData() is invoked on this DataSource or a component
bound to this DataSource, the data passed to the operation, if any, will be sent to the
dataURL
. The dataProtocol
property controls the format in
which the data is sent: SOAP message, HTTP GET or POST of parameters, etc.
The dataProtocol
property need not be set for a DataSource with a WebService
( serviceNamespace
is set), in this case, SOAP messaging is used by
default.
Developers may completely bypass the SmartGWT comm system by setting dataProtocol to
"clientCustom"
. In this case SmartGWT will not attempt to send any data
to the server after calling DataSource.transformRequest(com.smartgwt.client.data.DSRequest)
. Instead the developer is
expected to implement transformRequest()
such that it performs the necessary
data action outside of SmartGWT, and then calls DataSource.processResponse(java.lang.String, com.smartgwt.client.data.DSResponse)
,
passing in the requestId
and an appropriate set of DSResponse properties to
indicate the result of the action.
NOTE: when dataFormat
is "iscServer", dataProtocol
is not consulted.
Instead, SmartGWT uses a proprietary wire format to communicate with the SmartGWT
server, and the server-side DSRequest and DSResponse objects should be used to access
request data and form responses.
dataProtocol
- dataProtocol Default value is "getParams"public DSProtocol getDataProtocol()
When a DataSource operation such as fetchData() is invoked on this DataSource or a component
bound to this DataSource, the data passed to the operation, if any, will be sent to the
dataURL
. The dataProtocol
property controls the format in
which the data is sent: SOAP message, HTTP GET or POST of parameters, etc.
The dataProtocol
property need not be set for a DataSource with a WebService
( serviceNamespace
is set), in this case, SOAP messaging is used by
default.
Developers may completely bypass the SmartGWT comm system by setting dataProtocol to
"clientCustom"
. In this case SmartGWT will not attempt to send any data
to the server after calling DataSource.transformRequest(com.smartgwt.client.data.DSRequest)
. Instead the developer is
expected to implement transformRequest()
such that it performs the necessary
data action outside of SmartGWT, and then calls DataSource.processResponse(java.lang.String, com.smartgwt.client.data.DSResponse)
,
passing in the requestId
and an appropriate set of DSResponse properties to
indicate the result of the action.
NOTE: when dataFormat
is "iscServer", dataProtocol
is not consulted.
Instead, SmartGWT uses a proprietary wire format to communicate with the SmartGWT
server, and the server-side DSRequest and DSResponse objects should be used to access
request data and form responses.
public void setDataFormat(DSDataFormat dataFormat)
Typically set once for the DataSource as a whole via dataFormat
.
dataFormat
- dataFormat Default value is "iscServer"public DSDataFormat getDataFormat()
Typically set once for the DataSource as a whole via dataFormat
.
public void setDataTransport(RPCTransport dataTransport)
dataTransport
, which in
turn defaults to com.smartgwt.client.rpc.RPCManager#defaultTransport
. This would typically only be set to
enable "scriptInclude" transport for contacting dataFormat
web
services hosted on servers other than the origin server.
When using the "scriptInclude" transport, be sure to set callbackParam
or
callbackParam
to match the name of the query parameter name expected
by your JSON service provider.
dataTransport
- dataTransport Default value is RPCManager.defaultTransportpublic RPCTransport getDataTransport()
dataTransport
, which in
turn defaults to com.smartgwt.client.rpc.RPCManager#defaultTransport
. This would typically only be set to
enable "scriptInclude" transport for contacting dataFormat
web
services hosted on servers other than the origin server.
When using the "scriptInclude" transport, be sure to set callbackParam
or
callbackParam
to match the name of the query parameter name expected
by your JSON service provider.
public void setCallbackParam(java.lang.String callbackParam)
Typically set once for the DataSource as a whole via callbackParam
.
callbackParam
- callbackParam Default value is "callback"public java.lang.String getCallbackParam()
Typically set once for the DataSource as a whole via callbackParam
.
public void setPreventHTTPCaching(java.lang.Boolean preventHTTPCaching)
preventHTTPCaching
on a per-operationType basis.
preventHTTPCaching
- preventHTTPCaching Default value is nullpublic java.lang.Boolean getPreventHTTPCaching()
preventHTTPCaching
on a per-operationType basis.
public void setUseFlatFields(java.lang.Boolean useFlatFields)
useFlatFields
on an operationBinding is equivalent to setting
useFlatFields
on all DataSource requests with the same operationType
as this operationBinding
.
Typical usage is to combine operationBinding.useFlatFields with
useFlatFields
, with the SearchForm
bound to the WebService.getInputDS(java.lang.String)
of the web service operation set
as wsOperation
. This allows gratuitous nesting to be consistently
bypassed in both the user presentation and in the actual XML messaging.
Not that useFlatFields
is not generally recommended for use with input messages
where multiple simple type fields exist with the same name, however if used in this way,
the first field to use a given name wins. "first" means the first field encountered in a
depth first search. "wins" means only the first field will be available in data binding,
and only the first field will be populated in the generated XML message.
useFlatFields
- useFlatFields Default value is falsepublic java.lang.Boolean getUseFlatFields()
useFlatFields
on an operationBinding is equivalent to setting
useFlatFields
on all DataSource requests with the same operationType
as this operationBinding
.
Typical usage is to combine operationBinding.useFlatFields with
useFlatFields
, with the SearchForm
bound to the WebService.getInputDS(java.lang.String)
of the web service operation set
as wsOperation
. This allows gratuitous nesting to be consistently
bypassed in both the user presentation and in the actual XML messaging.
Not that useFlatFields
is not generally recommended for use with input messages
where multiple simple type fields exist with the same name, however if used in this way,
the first field to use a given name wins. "first" means the first field encountered in a
depth first search. "wins" means only the first field will be available in data binding,
and only the first field will be populated in the generated XML message.
public void setRecordXPath(java.lang.String recordXPath)
For example, an "ItemSearch" web service might return a "Results" structure containing metadata along with the set of Items that one might want to display in a grid. An XPath expression like "/Results/Items" could be used to retrieve just the Items, which would then become DataSource records.
For a JSON web service, the recordXPath
is applied to the returned JSON data
via XMLTools.selectObjects(java.lang.Object, java.lang.String)
. Only limited XPath syntax is allowed; see
XMLTools.selectObjects(java.lang.Object, java.lang.String)
for details.
For processing XML results, see xmlNamespaces
for information
on the namespaces that are available in this XPath expression.
To learn about XPath, try the following search: http://www.google.com/search?q=xpath+tutorial
recordXPath
- recordXPath Default value is nullpublic java.lang.String getRecordXPath()
For example, an "ItemSearch" web service might return a "Results" structure containing metadata along with the set of Items that one might want to display in a grid. An XPath expression like "/Results/Items" could be used to retrieve just the Items, which would then become DataSource records.
For a JSON web service, the recordXPath
is applied to the returned JSON data
via XMLTools.selectObjects(java.lang.Object, java.lang.String)
. Only limited XPath syntax is allowed; see
XMLTools.selectObjects(java.lang.Object, java.lang.String)
for details.
For processing XML results, see xmlNamespaces
for information
on the namespaces that are available in this XPath expression.
To learn about XPath, try the following search: http://www.google.com/search?q=xpath+tutorial
public void setRecordName(java.lang.String recordName)
This is a simple alternative to recordXPath
when the elements to be used as
records all share a tagName.
When a DataSource has a WebService, recordName
can also be set to the name
of any complexType
declared within the WebService's WSDL file.
recordName
- recordName Default value is nullpublic java.lang.String getRecordName()
This is a simple alternative to recordXPath
when the elements to be used as
records all share a tagName.
When a DataSource has a WebService, recordName
can also be set to the name
of any complexType
declared within the WebService's WSDL file.
public void setSpoofResponses(java.lang.Boolean spoofResponses)
serviceNamespace
, setting
this flag means the DataSource doesn't actually attempt to contact the server but generates
a sample response instead, based on the XML Schema of the response message embedded in the
WSDL.
The spoofed response will include all complexType elements and will fill in appropriate values by type for all simpleType elements, although the spoofed data will not conform to all xs:restriction declarations (eg xs:pattern).
Note that if your WSDL does not fully describe the response format (some WSDL services just
have a placeholder <xs:any> element), SmartGWT can only produce a partial
response. To use a hand-generated sample response, just save an XML file to disk and use
the dataURL
setting to point to it.
spoofResponses
- spoofResponses Default value is falsepublic java.lang.Boolean getSpoofResponses()
serviceNamespace
, setting
this flag means the DataSource doesn't actually attempt to contact the server but generates
a sample response instead, based on the XML Schema of the response message embedded in the
WSDL.
The spoofed response will include all complexType elements and will fill in appropriate values by type for all simpleType elements, although the spoofed data will not conform to all xs:restriction declarations (eg xs:pattern).
Note that if your WSDL does not fully describe the response format (some WSDL services just
have a placeholder <xs:any> element), SmartGWT can only produce a partial
response. To use a hand-generated sample response, just save an XML file to disk and use
the dataURL
setting to point to it.
public void setExportResults(java.lang.Boolean exportResults)
exportFilename
and
exportAs
respectively. When no exportFilename is provided, the
default is Results and the default value of exportAs is csv. Once the Operation
completes, exportDisplay
specifies whether the
exported data will be downloaded to the file-system or displayed in a new window. The
default value of exportDisplay is "download" which displays the Save As dialog. See
ExportDisplay
for more information.
The export field-list can also be configured, see exportFields
.
You can also configure the style of line-breaks to use when generating the output. See
com.smartgwt.client..LineBreakStyle
for more information.
As well as setting this and other properties on the OperationBinding
, Exports can be
initiated in two other ways. You can set properties on the dsRequest by passing
requestProperties into com.smartgwt.client.data.DataSource#exportData
. Note that this method does
not support exporting to JSON format (see
this post for more detail).
Additionally, custom server code may set export-related properties on the
DSResponse
.
Format Examples
XML format
<List> <Object> <id>10101</id> <displayName>Record 10101</displayName> </Object> </List>JSON Format
[ { id: 10101, displayName: "Record 10101" } ]CSV Format
id,displayName 10101,"Record 10101"
exportResults
- exportResults Default value is falsepublic java.lang.Boolean getExportResults()
exportFilename
and
exportAs
respectively. When no exportFilename is provided, the
default is Results and the default value of exportAs is csv. Once the Operation
completes, exportDisplay
specifies whether the
exported data will be downloaded to the file-system or displayed in a new window. The
default value of exportDisplay is "download" which displays the Save As dialog. See
ExportDisplay
for more information.
The export field-list can also be configured, see exportFields
.
You can also configure the style of line-breaks to use when generating the output. See
com.smartgwt.client..LineBreakStyle
for more information.
As well as setting this and other properties on the OperationBinding
, Exports can be
initiated in two other ways. You can set properties on the dsRequest by passing
requestProperties into com.smartgwt.client.data.DataSource#exportData
. Note that this method does
not support exporting to JSON format (see
this post for more detail).
Additionally, custom server code may set export-related properties on the
DSResponse
.
Format Examples
XML format
<List> <Object> <id>10101</id> <displayName>Record 10101</displayName> </Object> </List>JSON Format
[ { id: 10101, displayName: "Record 10101" } ]CSV Format
id,displayName 10101,"Record 10101"
public void setExportAs(ExportFormat exportAs)
ExportFormat
for more
information.
exportAs
- exportAs Default value is "csv"public ExportFormat getExportAs()
ExportFormat
for more
information.
public void setExportFilename(java.lang.String exportFilename)
exportFilename
- exportFilename Default value is nullpublic java.lang.String getExportFilename()
public void setLineBreakStyle(java.lang.String lineBreakStyle)
com.smartgwt.client..LineBreakStyle
for
more information.
lineBreakStyle
- lineBreakStyle Default value is nullpublic java.lang.String getLineBreakStyle()
com.smartgwt.client..LineBreakStyle
for
more information.
public void setQualifyColumnNames(java.lang.Boolean qualifyColumnNames)
qualifyColumnNames
property.
Only applicable to dataSources of serverType
"sql".
qualifyColumnNames
- qualifyColumnNames Default value is truepublic java.lang.Boolean getQualifyColumnNames()
qualifyColumnNames
property.
Only applicable to dataSources of serverType
"sql".
public void setInvalidateCache(java.lang.Boolean invalidateCache)
invalidateCache
- invalidateCache Default value is nullpublic java.lang.Boolean getInvalidateCache()
public void setExportFields(java.lang.String[] exportFields)
If exportFields is not provided, the exported output includes all visible fields from the DataSource (field.hidden=false), sorted in the order they're defined.
exportFields
- exportFields Default value is nullpublic java.lang.String[] getExportFields()
If exportFields is not provided, the exported output includes all visible fields from the DataSource (field.hidden=false), sorted in the order they're defined.
public void setXmlNamespaces(XmlNamespaces xmlNamespaces)
xmlNamespaces
- xml namespaces
java.lang.IllegalStateException
- this property cannot be changed after the underlying component has been createdpublic void setDefaultParams(java.util.Map defaultParams)
defaultParams
- the default paramspublic void setRequestProperties(DSRequest requestProperties)
DSRequest
created for this operation. Note that these will be cumulative
with and will override on a per-property basis any properties set via DataSource.requestProperties.
DataSource.transformRequest(com.smartgwt.client.data.DSRequest)
is called.
requestProperties
- the request properties. Default is null.public void setResponseDataSchema(DataSource responseDataSchema)
responseDataSchema
- the response schema. Default is null
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